bim.set_tab / bim.switch_tab not to create undo steps

To avoid unnecessary steps in undo history like on the screenshot - https://i.imgur.com/vEpsYa5.png

src/bonsai/bonsai/bim/operator.py

@@ -48,7 +48,7 @@ class SetTab(bpy.types.Operator):
     # NOTE: bl_label is set to empty string intentionally
     # to avoid showing the operator's name in the tooltips, see #3704
     bl_label = ""
-    bl_options = {"REGISTER", "UNDO", "INTERNAL"}
+    bl_options = {"INTERNAL"}
     tab: bpy.props.StringProperty()
 
     @classmethod
@@ -67,7 +67,7 @@ class SetTab(bpy.types.Operator):
 class SwitchTab(bpy.types.Operator):
     bl_idname = "bim.switch_tab"
     bl_label = "Switch Tab"
-    bl_options = {"REGISTER", "UNDO"}
+    bl_options = set()
     bl_description = "Switches to the last used tab"
 
     def execute(self, context):